p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - 4 S + 2 S^2.

Terms

a(0) =4a(1) =18a(2) =76a(3) =322a(4) =1360a(5) =5744a(6) =24256a(7) =102428a(8) =432528a(9) =1826456a(10) =7712656a(11) =32568568a(12) =137528704a(13) =580748416a(14) =2452351488a(15) =10355650832a(16) =43729255232a(17) =184657419808a(18) =779760883392